package com.example.demo.customer;

import com.example.demo.exception.NotFoundException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.Objects;

@Service

public class CustomerService {
    private final CustomerRepository customerRepository;


@Autowired
    public CustomerService(CustomerRepository customerRepository){
        this.customerRepository = customerRepository;
    }
    List<Customer> getCustomers(){
    return customerRepository.findAll();
    }

    Customer getCustomer(Long id){
        return customerRepository
                .findById(id)
                .orElseThrow(() -> new NotFoundException("customer"+id+" 无法找到"));

    }


}
